1: With copper dichloride in 1-methyl-pyrrolidin-2-one T=150°C; 2 h; 2: With hydrogenchloride; ammonia in DMF (N,N-dimethyl-formamide); water T=20°C; pH=5 - 6;

potassium chloride; copper(l) chloride T=120 - 170°C; 4 h;